Fin construction



Dec. 17, 1929. H. A. HIGGINS 1,739,672

FIN CONSTRUCTION I Filed Dec- 13 1926 Ala/r /?./Z 3 2% 5 35% K attoznu Patented Dec. 17, 1929 UNITED STATES PATENT OFFICE HARRY A. HIGGINS, OF DETROIT, MICHIGAN, ASSIGNOR T0 LONG MANUFACTURING COMPANY, OF DETROIT, MICHIGAN, A CORPORATION OF MICHIGAN FIN CONSTRUCTION Application filed December 13, 1926. Serial No. 154,552.

The invention relates to radiators which are particularly adapted for cooling the water of internal combustion engines in motor vehicles. The main object of the invention is to provide an improved construction of radiator fin to secure more eflicient cooling. Another object is to provide a fin construction which maybe economically manufactured. With these as. well as other objects in view, the invention residesv in the novel features of construction and combinations and arrangements of parts as more fully hereinafter set .forth.

I In the drawings Figure 1 is a front elevation ofthecore of a radiator embodying my invention;

Figure 2 is an enlarged fragmentary hori-.

zontal cross section therethrough;

Figures 3 and 4 are cross sections on the lines 3-3 and 44=, respectively, of Figure 2.

The core of the radiator in the present instance comprises the upper and lower headers 1 and 2,= respectively, the vertical cylindrical water tubes 3 extending between the headers, and the series .of horizontal heat radiating fins 4, through which the'tubes pass in heat conducting contact therewith. The

tubes 3 are arranged in a series of rows 3,

, which the tubes pass and arranged in heat 3 8 3, etc., each of which takes a zig zag ath. The fins 4 extend transversely of the tubes between ,the opposite sides and the front and rear of*the radiator and are vertically spaced from each other to form with the tubes a series of air passageways. These fins are preferably formed of sheet metal annular" having upwardly extending strips 5 surrounding the openlngs through flanges conducting contact with the tubes.

i For the purpose of securing more eflicient cooling or, inother wor s,- greater cooling effect per pound of metal, the fins are formed with the series of openings 6 intermediate the openings through which the tubes extend and also with an. integral raised projection 7 atthe rear edge of each opening '6, both the openings and projections being pEreferably formed by a stamping operation. ach projection 7 is raised slightly above the main portion of its fin and is inclined rearwardly and downwardly and is also preferably tapered I rearwardly to form on the-under side of the -fin .-a rearwardly tapering shallow recess. With thls arrangement, air passing through the passageways between the. fins and tubes the fins is displaced by colder air and the heat is more readily dissipated.

What I claim as my invention is: In'a radiator, the combination with a plurality of spaced rows of water tubes extend- 1ng from the front to the rear of the radiator,

the tubes of each row being arranged in a serpentine path to define tortuous air passageways between adjacent rows, of heat radiat- 1ng fins extending'transversely of and in heat conducting contact with said tubes, said fins being-provided with openings between the rows oftubes and rearwardly tapering incllned projections at the rear edges ofthe openings forming passages on the underside of the fins, the said passages having their inlet ends above the fins and facing in a direction opposite to the flow of air through the radiator adjacent the periphery of the vrespective openings, and their outlet ends on the underside of the fins and spaced. rearwardly of the respective openings to direct air passing between said fins through the 3 openings from one side ofthe fins to the other.

In testimony whereof I aflix my signature.

- HARRY A. HIGGINS. 

